A block of ice slides down a frictionless ramp at theta = 60 degrees while an ice worker pulls on the block (via a rope) with a constant force of 50.0 N. The block slides a distance d = 0.8m along the ramp and its kinetic energy increases by 128 J.
(a) Calculate the work done on the block by the gravitational force.
(b) Calculate the work done on the block by the normal force.
(c) Calculate the percent increase in its kinetic energy if it slid down the ramp the same distance with no rope attached.
I have no idea, that's my problem!
The Attempt at a Solution
I don't even know where to start!